Trial of former nurse Lindsay Clancy raises questions about postpartum psychosis

A Massachusetts jury heard opening statements Monday in the case of Lindsay Clancy, a former labor and delivery nurse accused of strangling her three children, ages five and younger, in 2023. While both prosecution and defense acknowledge the killings, they dispute whether Clancy should be held criminally responsible, with the defense arguing that postpartum psychosis may have driven her actions. Clancy and her ex-husband have sued her medical providers, alleging failure to diagnose and treat the condition.

Postpartum psychosis is considered a rare mental-health emergency, affecting an estimated 1 to 2 per 1,000 women after delivery, according to the Cleveland Clinic. Researchers note that about half of those diagnosed have a prior psychiatric history, and bipolar disorder is the most common risk factor. The disorder typically emerges within days of birth but can appear up to six weeks later, presenting symptoms such as hallucinations, delusions, paranoia, severe mood swings, disorganized thinking, insomnia, irritability and agitation.

Unlike the more common postpartum depression, which affects roughly 19% of U.S. mothers, or the transient “baby blues” experienced by about 80% of new mothers, postpartum psychosis can involve dangerous behavior toward the infant or self. Experts stress that immediate medical attention is crucial; treatment often requires inpatient care, which may include involuntary hospitalization, medication, or electroconvulsive therapy.

"Getting help early increases the odds of a good outcome," said a mental-health specialist familiar with postpartum psychosis.

The trial highlights the legal complexities of attributing criminal responsibility to individuals experiencing severe psychiatric episodes, while underscoring the need for heightened awareness and rapid intervention for postpartum mental-health emergencies.